PHYCICS HELP PLEACE 5 QUESTIONS 30POINTS

1) A car starts from a resting position and accelerates at a constant rate of 6 meters per second per second. What is the car's speed after it has traveled 250 meters?
A. 41.7 m/s
B. 54.8 m/s
C. 127.3 m/s
D. 1500 m/s

2) The speed of a boat undergoing constant acceleration increases from 5 meters per second to 15 meters per second over a period of 20 seconds. How far does the boat travel during this time?
A. 125 m
B. 150 m
C. 175 m
D. 200 m

3) A child throws a penny straight down into a wishing well. The penny's initial speed is 2 m/s. If the penny takes 3 seconds to hit the water, how deep is the well?
A. 20 m down
B. 46 m down
C. 50 m down
D. 94 m down

4) On Mars a rock falls an unknown vertical distance from a resting position and lands in a crater. If it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? Mars' surface gravity is 3.8 m/s2.
A. 9.5 m
B. 11.9 m
C. 15.2 m
D. 23.8 m

5) On Earth a rock falls an unknown vertical distance from a resting position and lands in a lake. If it takes the rock 2.5 seconds to fall, how high is the cliff that the rock fell from?
A. 24.5 m
B. 30.6 m
C. 38.1 m
D. 61.3 m